Abstract
The preparation of nanometer sized inclusions of Sb, Bi, and InSb in bulk PbTe using a general liquid matrix encapsulation technique was investigated. It was found that the reduction in lattice thermal conductivity was not monotonic with increasing concentration of nanoparticles but there is an optimum concentration beyond which the lattice thermal conductivity increases. Higher concentrations formed larger particles due to nanoparticle fusion giving rise to micrometer-sized structures. The TEM revealed that the systems contain well-dispersed nanocrystals of Sb, Bi, and InSb respectively. The frequency and the size of these nanocrystals depended on concentration where higher concentration favored on average larger nanocrystals. The dependence of the lattice thermal conductivity of the PbTe-Sb system was studied as a function of Sb concentration. The results show that nanostructuring enhances acoustic phonon scattering in PbTe without the need to prepare solid solutions.
| Original language | English |
|---|---|
| Pages (from-to) | 4993-4995 |
| Number of pages | 3 |
| Journal | Chemistry of Materials |
| Volume | 18 |
| Issue number | 21 |
| DOIs | |
| Publication status | Published - Oct 17 2006 |
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ASJC Scopus subject areas
- Materials Chemistry
- Materials Science(all)
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Strong reduction of thermal conductivity in nanostructured PbTe prepared by matrix encapsulation. / Scotsman, Joseph R.; Pcionek, Robert J.; Kong, Huijun; Uher, Ctirad; Kanatzidis, Mercouri G.
In: Chemistry of Materials, Vol. 18, No. 21, 17.10.2006, p. 4993-4995.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Strong reduction of thermal conductivity in nanostructured PbTe prepared by matrix encapsulation
AU - Scotsman, Joseph R.
AU - Pcionek, Robert J.
AU - Kong, Huijun
AU - Uher, Ctirad
AU - Kanatzidis, Mercouri G
PY - 2006/10/17
Y1 - 2006/10/17
N2 - The preparation of nanometer sized inclusions of Sb, Bi, and InSb in bulk PbTe using a general liquid matrix encapsulation technique was investigated. It was found that the reduction in lattice thermal conductivity was not monotonic with increasing concentration of nanoparticles but there is an optimum concentration beyond which the lattice thermal conductivity increases. Higher concentrations formed larger particles due to nanoparticle fusion giving rise to micrometer-sized structures. The TEM revealed that the systems contain well-dispersed nanocrystals of Sb, Bi, and InSb respectively. The frequency and the size of these nanocrystals depended on concentration where higher concentration favored on average larger nanocrystals. The dependence of the lattice thermal conductivity of the PbTe-Sb system was studied as a function of Sb concentration. The results show that nanostructuring enhances acoustic phonon scattering in PbTe without the need to prepare solid solutions.
AB - The preparation of nanometer sized inclusions of Sb, Bi, and InSb in bulk PbTe using a general liquid matrix encapsulation technique was investigated. It was found that the reduction in lattice thermal conductivity was not monotonic with increasing concentration of nanoparticles but there is an optimum concentration beyond which the lattice thermal conductivity increases. Higher concentrations formed larger particles due to nanoparticle fusion giving rise to micrometer-sized structures. The TEM revealed that the systems contain well-dispersed nanocrystals of Sb, Bi, and InSb respectively. The frequency and the size of these nanocrystals depended on concentration where higher concentration favored on average larger nanocrystals. The dependence of the lattice thermal conductivity of the PbTe-Sb system was studied as a function of Sb concentration. The results show that nanostructuring enhances acoustic phonon scattering in PbTe without the need to prepare solid solutions.
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U2 - 10.1021/cm0612090
DO - 10.1021/cm0612090
M3 - Article
VL - 18
SP - 4993
EP - 4995
JO - Chemistry of Materials
JF - Chemistry of Materials
SN - 0897-4756
IS - 21
ER -